'\" te
.\" Copyright (c) 2007, Sun Microsystems Inc. All Rights Reserved.
.\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License").  You may not use this file except in compliance with the License.
.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing.  See the License for the specific language governing permissions and limitations under the License.
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.TH SDP_FIND_MEDIA_RTPMAP 3COMMPUTIL "Oct 12, 2007"
.SH NAME
sdp_find_media_rtpmap \- find the rtpmap attribute in the specified media
.SH SYNOPSIS
.LP
.nf
\fBcc\fR [ \fIflag\fR...] \fIfile\fR... -\fBlcommputil\fR [ \fIlibrary\fR...]
#include <sdp.h>

\fBsdp_attr_t *\fR\fBsdp_find_media_rtpmap\fR(\fBsdp_media_t *\fR\fImedia\fR,
     \fBconst char *\fR\fIformat\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBsdp_find_media_rtpmap()\fR function searches the attribute list of the
specified media structure, \fImedia\fR, for the specified \fIformat\fR. If the
search is successful a pointer to that \fIrtpmap\fR attribute is returned.
Otherwise it returns \fINULL\fR.
.SH RETURN VALUES
.sp
.LP
The \fBsdp_find_media_rtpmap()\fR function returns the attribute (\fBsdp_attr_t
*\fR) on success and \fINULL\fR when the search fails or the mandatory input
parameters are \fINULL\fR.
.SH EXAMPLES
.LP
\fBExample 1 \fRAn (incomplete) SDP description that contains two media
sections: audio and video.
.sp
.in +2
.nf
m=audio 49170 RTP/AVP 0 8
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
m=video 51372 RTP/AVP 31 32
a=rtpmap:31 H261/90000
a=rtpmap:32 MPV/90000

/*
 * Assuming that above description is parsed using sdp_parse() and that
 * the parsed structure is in "session" sdp_session_t structure.
 */

sdp_media_t     *video;
sdp_attr_t      *mpv;

video = sdp_find_media(session->s_media, "video);
mpv = sdp_find_media_rtpmap(video, "32");

/*
 * Now the attribute structure sdp_attr_t, mpv will be having
 * values from the attribute field "a=rtpmap:32 MPV/90000"
 */
.fi
.in -2

.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(7) for descriptions of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
Interface Stability	Committed
_
MT-Level	Safe
.TE

.SH SEE ALSO
.sp
.LP
.BR sdp_parse (3COMMPUTIL),
.BR libcommputil (3LIB),
.BR attributes (7)
